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IBM C2090-421 Exam Syllabus Topics:

IBM InfoSphere DataStage v8.5 Sample Questions:

1. What stage allows for more than one reject link?

A) Merge stage
B) Join stage
C) Lookup stage
D) Peek stage
E) Funnel stage

2. Which of the following describes a type two update in a Slowly Changing Dimensions (SCD) stage?

A) An update that overwrites the existing column value.
B) An update that retains the existing column value in a list and adds the new value to the list.
C) An update the retains the existing column value in an historical row and creates a new row with the new value.
D) An update that replaces the existing column value if a specified condition is satisfied.

3. A scenario requires selecting only the most recent transactions for each of 2 million unique customers, from a 20 million row DB2 source table containing order history. Which parallel job design would satisfy this functional requirement?

A) Select all rows using the ODBC Connector stage, use a Sort Aggregator on customer number key to select the maximum order date.
B) Using the DB2 Enterprise stage, select all rows. Perform a unique Sort using customer number and order date sort keys in ascending order.
C) Using the DB2 API stage, select all rows. Use a Sort stage with customer number and order date sort keys in ascending order, then Remove Duplicates with Last Duplicate to retain.
D) Using the Dynamic Relational stage, use custom SQL to select all DISTINCT customer numbers from the order history table.

4. You are using the Change Capture stage in your job design to identify changes made to the input link (before image) to obtain the results in the output link. This job will be using a multi-node configuration file when executed.
What are two requirements on the input link data for the Change Capture stage? (Select two)

A) Merged links
B) Key partitioned
C) Sorted
D) Sequential mode

5. You have been given operational requirements to introduce data recovery to one of your parallel job designs. Additionally, you have been told that you are to use flat files as your intermediate data structure. Which two tasks will accomplish these objectives? (Choose two.)

A) Use the Hash File stage to write and read data between parallel jobs.
B) Enable checkpoint restartability in each of your parallel stages.
C) Break up the design by splitting it into at least two parallel jobs.
D) Use the Sequential stage to export and import data between jobs.

Solutions: